Show coordinates - expanded functionality - height over sea level value

[JakubPelka]

Problem: Right now a coordinates tool shows only X,Y values. But in fact we have height data in raster format accessible.

Need: If value tool could also read the height value so instead of coordinates tool we might have XYZ tool that will present expected height of terrain on a click position. Exposed as another value in the box.

[jacobwod]

This is surely a nice-to-have, but I feel that we will introduce a lot of ambiguity: while the coordinates are exact values, no question about it, the proposed Z-axis reading's accuracy will depend on the source. By presenting them directly next to each other, we give the user an impression that the height measurement is just as exact as the longitude and latitude readings - which it isn't.

Perhaps a better way of solving this is having a clickable layer that gives those reading. In the infoclick dialog we could present the user with additional info, such as where the height measurement comes from and how exact it is.

What's the communities opinion on this?